JPH0366218U - - Google Patents
Info
- Publication number
- JPH0366218U JPH0366218U JP12491089U JP12491089U JPH0366218U JP H0366218 U JPH0366218 U JP H0366218U JP 12491089 U JP12491089 U JP 12491089U JP 12491089 U JP12491089 U JP 12491089U JP H0366218 U JPH0366218 U JP H0366218U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- coil
- resistor
- varicap
- grounded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案の一実施例を示すフイルタの電
気回路図、第２図は同第１図動作説明図、第３図
は従来のフイルタの電気回路図である。
１３……バリキヤツプ、１４……制御電圧であ
る。
FIG. 1 is an electric circuit diagram of a filter showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation shown in FIG. 1, and FIG. 3 is an electric circuit diagram of a conventional filter. 13... Varicap, 14... Control voltage.
Claims (1)
に第１のコイルに接続し、同第１のコイルの他端
を第２のコンデンサと第２のコイルとに接続し、
同第２のコイルの他端を第３のコンデンサと第３
のコイルとに接続し、同第３のコイルの他端を第
２の端子に接続すると共に第４のコンデンサで接
地し、制御電圧を第１の抵抗と第２の抵抗とに接
続し、同第１の抵抗と第２の抵抗の他端をそれぞ
れ前記第２のコンデンサと第３のコンデンサの他
端に接続し、同接続点と接地間にそれぞれ第１の
バリキヤツプと第２のバリキヤツプとを同バリキ
ヤツプのアノードを接地する方向に接続し、前記
制御電圧の印加により遮断周波数を変化してなる
低域用フイルタ回路。 A first terminal is grounded by a first capacitor and connected to a first coil, the other end of the first coil is connected to a second capacitor and a second coil,
The other end of the second coil is connected to a third capacitor and a third
the other end of the third coil is connected to the second terminal and grounded through the fourth capacitor, the control voltage is connected to the first resistor and the second resistor, The other ends of the first resistor and the second resistor are connected to the other ends of the second capacitor and the third capacitor, respectively, and a first varicap and a second varicap are connected between the connection points and ground, respectively. A low frequency filter circuit in which the anode of the varicap is connected in the direction of grounding, and the cutoff frequency is changed by applying the control voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12491089U JPH0366218U (en) | 1989-10-24 | 1989-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12491089U JPH0366218U (en) | 1989-10-24 | 1989-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366218U true JPH0366218U (en) | 1991-06-27 |
Family
ID=31672805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12491089U Pending JPH0366218U (en) | 1989-10-24 | 1989-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366218U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213016B2 (en) * | 1983-02-17 | 1987-03-23 | Moritsugu Ootori | |
| JPH01238321A (en) * | 1988-03-18 | 1989-09-22 | Toshiba Corp | Input circuit for tuner |
-
1989
- 1989-10-24 JP JP12491089U patent/JPH0366218U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213016B2 (en) * | 1983-02-17 | 1987-03-23 | Moritsugu Ootori | |
| JPH01238321A (en) * | 1988-03-18 | 1989-09-22 | Toshiba Corp | Input circuit for tuner |